Informations générales
Intitulé de l'offre : Post-doctoral fellow (M/F) - Nanoscale study of infrared emission from van der Waals heterostructures and plasmonic antennas. (H/F)
Référence : UMR7587-YANDEW-006
Nombre de Postes : 1
Lieu de travail : PARIS 05
Date de publication : lundi 10 mars 2025
Type de contrat : Chercheur en contrat CDD
Durée du contrat : 18 mois
Date d'embauche prévue : 1 mai 2025
Quotité de travail : Complet
Rémunération : 3500 to 4250 euros gross per month depending on seniority
Niveau d'études souhaité : Doctorat
Expérience souhaitée : 1 à 4 années
Section(s) CN : 01 - Interactions, particules, noyaux du laboratoire au cosmos
Missions
We recently demonstrated with Emmanuel Baudin's group (LPENS) that graphene-based transistors encapsulated in boron nitride (hBN) are electroluminescent in the mid-infrared [Abou-Hamdan_NATURE2025]. This exotic source of light from a van der Waals heterostructure was investigated so far by ultra-sensitive infrared microscopy combined with Fourier transform infrared spectroscopy (FTIR) [Li_PRL2018; Abou-Hamdan_ACSPhot2022 ].
We hire a motivated experimentalist to extend our knowledge of graphene electroluminescence by carrying out infrared near-field scanning optical microscopy measurements on graphene-based devices in operation. We will use for these studies a TRSTM (thermal radiation scanning tunnelling microscope) developed by our team. Similar to a SNOM, this unique instrument uses a tungsten tip as a local scatterer to image near-field infrared radiation emitted by the sample itself, rather than using external illumination [DeWilde_NATURE2006]. It can also be used to perform super-resolved FTIR spectroscopy. A similar approach was successfully used in our team to investigate non-Planckian near-field thermal radiation [Babuty_PRL2013].
The second objective of this postdoc is to use intense laser illumination to excite thermally some specific electromagnetic modes of infrared plasmonic nano-antennas [Langevin_PRL2024] in order to produce optically programmable infrared sources. Such optically programmable devices produced in collaboration with Patrick Bouchon's group at ONERA could be of use in the future for free space infrared telecommunications.
Activités
Main tasks in experimental physics:
- Ultra-sensitive infrared measurements on active van der Waals heterostructures
- TRSTM; SNOM
- FTIR spectroscopy; IR SMS (spatially-modulated infrared spectroscopy)
- Setting up laser heating of plasmonic antennas on measurement bench
- Electromagnetic modeling
Secondary tasks:
- Design of plasmonic antenna samples for lithography
- Contribution to other experimental studies
Compétences
Required skills:
- Experimental physics
- Optics; Nano-optics
- Scanning probe microscopy : Mastery of near-field microscopy techniques. Desirable experience: manipulation with infrared SNOM; manipulation preferably with RHK control electronics; FTIR spectroscopy.
- FTIR spectroscopy; infrared nano-spectroscopy
- Electromagnetic modeling (COMSOL, LUMERCIAL, RETICOLO, MAN, SCUFF EM, ...)
Contexte de travail
Host laboratory and team:
Located in the heart of Paris, the Institut Langevin is a world-renowned research unit of ESPCI Paris, PSL University and CNRS, dedicated to wave physics and its applications.
Dr. Yannick De Wilde is both Director of the Institut Langevin and head of a team of experimental physicists whose activities are mainly focused on nano-optics and plasmonics in the infrared, micro- and nano-thermics, near-field microscopies, super-resolved imaging and spectroscopy, ….
He collaborates since long with the research groups involved in the project.
Contraintes et risques
No particular risk, except for the use of lasers.
Informations complémentaires
Contact: Yannick DE WILDE
yannick.dewilde@espci.fr